BD Custom 13:1 Improved 4mm Axis Gear Set

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SKU 17406
  • Big Dragon gear sets have reinforced construction which minimizes tooth breakage.
  • This set is a high speed kit which offers a massive rate of fire with a 13:1 turn ratio.
  • Compatible with virtually all gearboxes.
  • Requires bushing or bearings that allow 4mm axis. 

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